Microprocessor

专利名称：Microprocessor发明人：Tanaka, Shigeya,Iwamura,

Masahiro,Yamauchi, Tatsumi,Nojiri,Tatsuo,Tada, Hisashi,Nakano, Tetsuo

申请号：EP89113706.9申请日：19890725公开号：EP0352745A3公开日：19910306

专利附图：

摘要：A microprocessor according to the present invention comprises a sub-read bus(203), to which output terminals of registers (6) of a register file of the microprocessor

are coupled. The sub-read bus is in turn coupled to a main read bus (201) of themicroprocessor through a bus output circuit (18). Upon occurrence of a read access toany of the registers (16), the bus output circuit (18) couples the sub-read bus (203) withthe main read bus (201), whereby data read out from the registers (16) to the sub-readbus are transmitted to the main read bus (201), and under no existence of the readaccess, the bus output circuit interrupts the data transmission from the sub-read bus tothe main read bus. With this, a load capacitance of the read bus is reduced. As a result, anaccess time for access to the read bus is reduced.

申请人：HITACHI, LTD.

地址：6, Kanda Surugadai 4-chome Chiyoda-ku, Tokyo 101 JP

国籍：JP

代理机构：Patentanwälte Beetz - Timpe - Siegfried Schmitt-Fumian - Mayr

更多信息请下载全文后查看